As if a solid 18k gold Longines Flagship wasn’t enough, this one has a sigma σ patterned dial and the original strap and buckle.


The use of the sigma symbol on the dial, the 52,***,*** serial number and movement production dates all suggest this was made circa 1973.


As the price of gold shot up in value, a group of high end Swiss watch manufacturers started to us the sigma σ letter at the foot of the dial to show that the hands and markers were made of the highest quality materials.  It was an attempt to prove that no corners were being cut, and you can read more about sigma dials here.  The dial itself is quite special in the design, with scooped or carved patterned bouncing the light around in a very nice way.  The case is solid 18k, with screw down case back, and is the C shape (named after the Flagship chief rival, the Omega Constellation).  The case is in very good shape and difficult to fault.  The movement fitted is Longines 6641, a 25 jewel automatic which was adjusted to four positions and runs at 28.8kbph.  It can also be handwound via the signed crown.  The alligator leather strap is used and can not be exported outside of the UK due to CITES rules, but if this watch is exported we will fit a standard cow leather strap and transfer the Longines signed gold plated buckle.  Gold plated buckles are not uncommon on heavier gold watches like this Flagship, as it stronger on this key component than softer 18k gold.

This watch will be supplied with our branded presentation box and our Certificate of Authenticity.

This watch has been checked against the Watch Register and has not been reported as lost, stolen or implicated in fraud, and a copy of that certificate will also be included.

Please see the HD video for more detail.  All photos and videos are part of the description and are of the actual watch unless mentioned.  We do not photoshop any pictures, and the images are copyright of and should not be used without permission.


Width with crown  37.2 mm

Width without crown  34.7 mm

Between lugs  19 mm

Lug to lug length  38.3 mm

Case Thickness  12.0 mm

All sizes are approximate.  The watch is photographed on a wrist of 190mm/7.5 inches.

Included with this watch is a 3 month guarantee and free delivery to UK addresses.  If you live outside the UK we can still deliver to most countries.  Please see our Worldwide Shipping information, or Contact Us.   Payment can be made by most credit or debit cards, bank transfer or PayPal.

From 1st September 2021 we will be planting a tree for every watch we sell, working with the International Tree Foundation (Est 1922) to make this business positive on carbon.  By buying anything pre owned you are effectively reusing what already exists, but this takes it further and makes us feel good.